Grain boundary energy anisotropy: a review
WebMar 1, 2024 · Grain boundary energy Grain boundary area Tungsten Reducing the size of crystal grains to the nanoscale has been realized as a key principle for enhancing … WebThe grain-boundary energies of individual boundaries have been determined by the analysis of the shapes of grain-boundary grooves. The effects of surface-energy anisotropy are fully taken into account. The results indicate that only boundaries associated with high-coincidence orientations (∑3 and ∑11) have significantly lower …
Grain boundary energy anisotropy: a review
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WebApr 9, 2024 · The review ends with some questions to be addressed by future research and a summary of what is known about grain boundary energy anisotropy. View Show abstract Web2 days ago · The grain boundary hindered dislocation movement, and the dislocation was accumulated at the grain boundary, hindering the grain boundary growth, which had the effect of grain refinement. Observe in Fig. 13 that the stacking of dislocations was wound into dislocation walls, which could further develop into sub-grain boundaries and form …
WebFeb 15, 2014 · To the extent that the proposed energy function is indeed universal for fcc metals, one needs to measure or compute just two GB energies, e.g. that of the Σ3 coherent twin boundary and one of the high-energy random boundaries, to fully define the GB energy anisotropy for a given fcc material in the entire 5-space. WebOct 29, 2015 · In contrast, a change of the grain boundary energy would lead to a change in topology and driving force; accordingly, the grain boundary energy anisotropy is suggested to dominate microstructure evolution . However, in this case bimodal grain growth can occur, if a critical number of sides are of the fast type . Accordingly, the …
WebDec 27, 2024 · Conductivity anisotropy of sample G100c containing low-angle grain boundaries along the b direction. The dashed line denotes completely isotropic in-plane conductivity. The inset shows an Arrhenius plot of the barrier-related mobility [compare Eq. ; the fit between 200 and 365 K results in an activation energy of 93 ± 5 meV]. Reuse & … WebKeywords: Grain growth; Grain boundaries; Grain boundary energy; Grain boundary mobility; Anisotropy. Version 12/14/04, submitted to Scripta Mater. Introduction The distribution of grain boundary types in a polycrystalline material has been shown to affect its bulk properties, e.g. corrosion resistance [1].
WebIn this paper, the corrosion resistance and mechanical properties of the 7075 aluminum alloy are studied. The alloy was deformed by hydrostatic extrusion and then aged both naturally and artificially. Results are compared with those of coarse-grained material subjected to T6 heat treatment. The aim of the research is to find the optimal correlation between the …
WebExperimental methods for measuring the grain boundary energy anisotropy, all of which involve application of the Herring equation, are then briefly described. The next section … eagle and snake symbolismWebMar 1, 2024 · Describing microstructure evolution in tungsten requires a quantitative description of the anisotropic grain boundary energy. We present a grain boundary … c shoe widthWebMay 29, 2024 · Grain boundary (GB) segregation has a substantial effect on the microstructure evolution and properties of polycrystalline alloys. The mechanism of … csholdWebGrain boundary complexion transitions can lead to rapid changes in the macroscopic properties of polycrystalline metals and ceramics and are responsible for a variety of … csho in safetyWebOct 1, 2024 · Current grain growth models have evolved to account for the relationship between grain boundary energy/mobility anisotropy and the five degrees of grain boundary character. However, the role of grain boundary networks on overall growth kinetics remains poorly understood. ... Physical Review, Vol. 78, Issue 3; DOI: … csho in oshaWebMay 19, 2008 · Successful applications of segregation isotherms based on standard thermodynamic state functions of segregation are demonstrated for three examples: … eagle and sun hanbury wharfWebThe review concludes with a prospectus for future studies of grain boundary energy anisotropy and a summary. Grain boundaries are defects that have an excess free … eagle and the albatross